dotnfc Tang / LibPN532

PN532 Driver library This library provides an abstract API to drive the pn532 nfc chip, with I2C/HSU/SPI interface. Its based on the Seeed Studio's Arduino version.

Dependents:   PN532_ReadUid Nfctest2

PN532/examples/mifareclassic_formatndef/mifareclassic_formatndef.pde@0:db8030e71f55, 2016-09-13 (annotated)

Committer:
dotnfc
Date:
Tue Sep 13 06:01:19 2016 +0000
Revision:
0:db8030e71f55
first commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dotnfc 0:db8030e71f55 1 /**************************************************************************/
dotnfc 0:db8030e71f55 2 /*!
dotnfc 0:db8030e71f55 3 This example attempts to format a clean Mifare Classic 1K card as
dotnfc 0:db8030e71f55 4 an NFC Forum tag (to store NDEF messages that can be read by any
dotnfc 0:db8030e71f55 5 NFC enabled Android phone, etc.)
dotnfc 0:db8030e71f55 6
dotnfc 0:db8030e71f55 7 Note that you need the baud rate to be 115200 because we need to print
dotnfc 0:db8030e71f55 8 out the data and read from the card at the same time!
dotnfc 0:db8030e71f55 9
dotnfc 0:db8030e71f55 10 To enable debug message, define DEBUG in PN532/PN532_debug.h
dotnfc 0:db8030e71f55 11 */
dotnfc 0:db8030e71f55 12 /**************************************************************************/
dotnfc 0:db8030e71f55 13
dotnfc 0:db8030e71f55 14 #include <SPI.h>
dotnfc 0:db8030e71f55 15 #include <PN532_SPI.h>
dotnfc 0:db8030e71f55 16 #include "PN532.h"
dotnfc 0:db8030e71f55 17
dotnfc 0:db8030e71f55 18 PN532_SPI pn532spi(SPI, 10);
dotnfc 0:db8030e71f55 19 PN532 nfc(pn532spi);
dotnfc 0:db8030e71f55 20
dotnfc 0:db8030e71f55 21 /*
dotnfc 0:db8030e71f55 22 We can encode many different kinds of pointers to the card,
dotnfc 0:db8030e71f55 23 from a URL, to an Email address, to a phone number, and many more
dotnfc 0:db8030e71f55 24 check the library header .h file to see the large # of supported
dotnfc 0:db8030e71f55 25 prefixes!
dotnfc 0:db8030e71f55 26 */
dotnfc 0:db8030e71f55 27 // For a http://www. url:
dotnfc 0:db8030e71f55 28 const char * url = "seeedstudio.com";
dotnfc 0:db8030e71f55 29 uint8_t ndefprefix = NDEF_URIPREFIX_HTTP_WWWDOT;
dotnfc 0:db8030e71f55 30
dotnfc 0:db8030e71f55 31 // for an email address
dotnfc 0:db8030e71f55 32 //const char * url = "mail@example.com";
dotnfc 0:db8030e71f55 33 //uint8_t ndefprefix = NDEF_URIPREFIX_MAILTO;
dotnfc 0:db8030e71f55 34
dotnfc 0:db8030e71f55 35 // for a phone number
dotnfc 0:db8030e71f55 36 //const char * url = "+1 212 555 1212";
dotnfc 0:db8030e71f55 37 //uint8_t ndefprefix = NDEF_URIPREFIX_TEL;
dotnfc 0:db8030e71f55 38
dotnfc 0:db8030e71f55 39
dotnfc 0:db8030e71f55 40 void setup(void) {
dotnfc 0:db8030e71f55 41 Serial.begin(115200);
dotnfc 0:db8030e71f55 42 Serial.println("Looking for PN532...");
dotnfc 0:db8030e71f55 43
dotnfc 0:db8030e71f55 44 nfc.begin();
dotnfc 0:db8030e71f55 45
dotnfc 0:db8030e71f55 46 uint32_t versiondata = nfc.getFirmwareVersion();
dotnfc 0:db8030e71f55 47 if (! versiondata) {
dotnfc 0:db8030e71f55 48 Serial.print("Didn't find PN53x board");
dotnfc 0:db8030e71f55 49 while (1); // halt
dotnfc 0:db8030e71f55 50 }
dotnfc 0:db8030e71f55 51
dotnfc 0:db8030e71f55 52 // Got ok data, print it out!
dotnfc 0:db8030e71f55 53 Serial.print("Found chip PN5"); Serial.println((versiondata>>24) & 0xFF, HEX);
dotnfc 0:db8030e71f55 54 Serial.print("Firmware ver. "); Serial.print((versiondata>>16) & 0xFF, DEC);
dotnfc 0:db8030e71f55 55 Serial.print('.'); Serial.println((versiondata>>8) & 0xFF, DEC);
dotnfc 0:db8030e71f55 56
dotnfc 0:db8030e71f55 57 // configure board to read RFID tags
dotnfc 0:db8030e71f55 58 nfc.SAMConfig();
dotnfc 0:db8030e71f55 59 }
dotnfc 0:db8030e71f55 60
dotnfc 0:db8030e71f55 61 void loop(void) {
dotnfc 0:db8030e71f55 62 uint8_t success; // Flag to check if there was an error with the PN532
dotnfc 0:db8030e71f55 63 uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 }; // Buffer to store the returned UID
dotnfc 0:db8030e71f55 64 uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
dotnfc 0:db8030e71f55 65 bool authenticated = false; // Flag to indicate if the sector is authenticated
dotnfc 0:db8030e71f55 66
dotnfc 0:db8030e71f55 67 // Use the default key
dotnfc 0:db8030e71f55 68 uint8_t keya[6] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
dotnfc 0:db8030e71f55 69
dotnfc 0:db8030e71f55 70 Serial.println("");
dotnfc 0:db8030e71f55 71 Serial.println("PLEASE NOTE: Formatting your card for NDEF records will change the");
dotnfc 0:db8030e71f55 72 Serial.println("authentication keys. To reformat your NDEF tag as a clean Mifare");
dotnfc 0:db8030e71f55 73 Serial.println("Classic tag, use the mifareclassic_ndeftoclassic example!");
dotnfc 0:db8030e71f55 74 Serial.println("");
dotnfc 0:db8030e71f55 75 Serial.println("Place your Mifare Classic card on the reader to format with NDEF");
dotnfc 0:db8030e71f55 76 Serial.println("and press any key to continue ...");
dotnfc 0:db8030e71f55 77 // Wait for user input before proceeding
dotnfc 0:db8030e71f55 78 while (!Serial.available());
dotnfc 0:db8030e71f55 79 // a key was pressed1
dotnfc 0:db8030e71f55 80 while (Serial.available()) Serial.read();
dotnfc 0:db8030e71f55 81
dotnfc 0:db8030e71f55 82 // Wait for an ISO14443A type card (Mifare, etc.). When one is found
dotnfc 0:db8030e71f55 83 // 'uid' will be populated with the UID, and uidLength will indicate
dotnfc 0:db8030e71f55 84 // if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)
dotnfc 0:db8030e71f55 85 success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength);
dotnfc 0:db8030e71f55 86
dotnfc 0:db8030e71f55 87 if (success)
dotnfc 0:db8030e71f55 88 {
dotnfc 0:db8030e71f55 89 // Display some basic information about the card
dotnfc 0:db8030e71f55 90 Serial.println("Found an ISO14443A card");
dotnfc 0:db8030e71f55 91 Serial.print(" UID Length: ");Serial.print(uidLength, DEC);Serial.println(" bytes");
dotnfc 0:db8030e71f55 92 Serial.print(" UID Value: ");
dotnfc 0:db8030e71f55 93 nfc.PrintHex(uid, uidLength);
dotnfc 0:db8030e71f55 94 for (uint8_t i = 0; i < uidLength; i++) {
dotnfc 0:db8030e71f55 95 Serial.print(uid[i], HEX);
dotnfc 0:db8030e71f55 96 Serial.print(' ');
dotnfc 0:db8030e71f55 97 }
dotnfc 0:db8030e71f55 98 Serial.println("");
dotnfc 0:db8030e71f55 99
dotnfc 0:db8030e71f55 100 // Make sure this is a Mifare Classic card
dotnfc 0:db8030e71f55 101 if (uidLength != 4)
dotnfc 0:db8030e71f55 102 {
dotnfc 0:db8030e71f55 103 Serial.println("Ooops ... this doesn't seem to be a Mifare Classic card!");
dotnfc 0:db8030e71f55 104 return;
dotnfc 0:db8030e71f55 105 }
dotnfc 0:db8030e71f55 106
dotnfc 0:db8030e71f55 107 // We probably have a Mifare Classic card ...
dotnfc 0:db8030e71f55 108 Serial.println("Seems to be a Mifare Classic card (4 byte UID)");
dotnfc 0:db8030e71f55 109
dotnfc 0:db8030e71f55 110 // Try to format the card for NDEF data
dotnfc 0:db8030e71f55 111 success = nfc.mifareclassic_AuthenticateBlock (uid, uidLength, 0, 0, keya);
dotnfc 0:db8030e71f55 112 if (!success)
dotnfc 0:db8030e71f55 113 {
dotnfc 0:db8030e71f55 114 Serial.println("Unable to authenticate block 0 to enable card formatting!");
dotnfc 0:db8030e71f55 115 return;
dotnfc 0:db8030e71f55 116 }
dotnfc 0:db8030e71f55 117 success = nfc.mifareclassic_FormatNDEF();
dotnfc 0:db8030e71f55 118 if (!success)
dotnfc 0:db8030e71f55 119 {
dotnfc 0:db8030e71f55 120 Serial.println("Unable to format the card for NDEF");
dotnfc 0:db8030e71f55 121 return;
dotnfc 0:db8030e71f55 122 }
dotnfc 0:db8030e71f55 123
dotnfc 0:db8030e71f55 124 Serial.println("Card has been formatted for NDEF data using MAD1");
dotnfc 0:db8030e71f55 125
dotnfc 0:db8030e71f55 126 // Try to authenticate block 4 (first block of sector 1) using our key
dotnfc 0:db8030e71f55 127 success = nfc.mifareclassic_AuthenticateBlock (uid, uidLength, 4, 0, keya);
dotnfc 0:db8030e71f55 128
dotnfc 0:db8030e71f55 129 // Make sure the authentification process didn't fail
dotnfc 0:db8030e71f55 130 if (!success)
dotnfc 0:db8030e71f55 131 {
dotnfc 0:db8030e71f55 132 Serial.println("Authentication failed.");
dotnfc 0:db8030e71f55 133 return;
dotnfc 0:db8030e71f55 134 }
dotnfc 0:db8030e71f55 135
dotnfc 0:db8030e71f55 136 // Try to write a URL
dotnfc 0:db8030e71f55 137 Serial.println("Writing URI to sector 1 as an NDEF Message");
dotnfc 0:db8030e71f55 138
dotnfc 0:db8030e71f55 139 // Authenticated seems to have worked
dotnfc 0:db8030e71f55 140 // Try to write an NDEF record to sector 1
dotnfc 0:db8030e71f55 141 // Use 0x01 for the URI Identifier Code to prepend "http://www."
dotnfc 0:db8030e71f55 142 // to the url (and save some space). For information on URI ID Codes
dotnfc 0:db8030e71f55 143 // see http://www.ladyada.net/wiki/private/articlestaging/nfc/ndef
dotnfc 0:db8030e71f55 144 if (strlen(url) > 38)
dotnfc 0:db8030e71f55 145 {
dotnfc 0:db8030e71f55 146 // The length is also checked in the WriteNDEFURI function, but lets
dotnfc 0:db8030e71f55 147 // warn users here just in case they change the value and it's bigger
dotnfc 0:db8030e71f55 148 // than it should be
dotnfc 0:db8030e71f55 149 Serial.println("URI is too long ... must be less than 38 characters long");
dotnfc 0:db8030e71f55 150 return;
dotnfc 0:db8030e71f55 151 }
dotnfc 0:db8030e71f55 152
dotnfc 0:db8030e71f55 153 // URI is within size limits ... write it to the card and report success/failure
dotnfc 0:db8030e71f55 154 success = nfc.mifareclassic_WriteNDEFURI(1, ndefprefix, url);
dotnfc 0:db8030e71f55 155 if (success)
dotnfc 0:db8030e71f55 156 {
dotnfc 0:db8030e71f55 157 Serial.println("NDEF URI Record written to sector 1");
dotnfc 0:db8030e71f55 158 }
dotnfc 0:db8030e71f55 159 else
dotnfc 0:db8030e71f55 160 {
dotnfc 0:db8030e71f55 161 Serial.println("NDEF Record creation failed! :(");
dotnfc 0:db8030e71f55 162 }
dotnfc 0:db8030e71f55 163 }
dotnfc 0:db8030e71f55 164
dotnfc 0:db8030e71f55 165 // Wait a bit before trying again
dotnfc 0:db8030e71f55 166 Serial.println("\n\nDone!");
dotnfc 0:db8030e71f55 167 delay(1000);
dotnfc 0:db8030e71f55 168 Serial.flush();
dotnfc 0:db8030e71f55 169 while(Serial.available()) Serial.read();
dotnfc 0:db8030e71f55 170 }